This specialized traffic sign provides critical guidance for highway-rail grade crossings where quiet zones have been established. Designed to meet both state and federal Department of Transportation (DOT) and Manual on Uniform Traffic Control Devices (MUTCD) standards, the sign is constructed on high-quality aluminum with radius corners and 3/8" prepunched holes. Engineered for maximum visibility, the sign utilizes high-intensity or diamond grade reflective sheeting, ensuring clear communication to drivers about the absence of train horn warnings. Specifically, this W10-9P plaque is intended to be mounted directly below a Grade Crossing Advance Warning sign, providing supplemental information in compliance with 49 CFR Part 222 regulations for each direction at designated quiet zone crossings.